Spraying apparatus



Jan. 7, 1947. J, P, JASON SPRAYING APPARATUS Filed Dec. 11, 1943 2Sheets-Sheet 1 Jan. 7, 1947. J. P. JASON 2,413,710 v SPRAYING APPARATUSFiled Dec. 11, 1943 B'Sheets-Sheet 2 Gif/a@ Patentecl Jan. 7, 1,947

-SPRAYING APPARATUS John P. Jason, Chicago, Ill., assigner, by mesneassignments, to Sprayer- Corporation of America, Chicago, Ill., acorporation of Illinois Application December 11, 1943, Serial No.513,889

, 1 Claim.

'I'his invention relates to novel improvements inthe construction of ahand portable apparatus adapted to spray liquids such as insecticides,fumigants, deodorants and the like, by compressor action in the form -ofa iine mist.

In general the apparatus to which the improvements of thepresentinvention relate comprises a unit composed of an encased motor, aseparable liquid container and an intermediate compressor all axiallyarranged.

It is an object of the present invention to provide such apparatus in amore compact construction of reduced height. This is in partaccomplished by providing a. telescopic construction wherein thecompressor extends within the liquid container. In addition to theadvantage of reduction in height and the lowering of the center ofgravity of the unit which makes it easier to y and stability when leftstanding alone on the container bottom for such uses as spraying orfumigating a room, the improved construction has the added advantage inthat any oozings or leakage can run back into the liquid containerinstead of exteriorly thereof as was the case in former constructions.

Another object relates to the adjustable construction of the definingwall or sleeve of the compressor whereby it may be adjusted laterallyvto take up wear and provide the desired degree of eccentricity so as toenable the device to be operated with a maximum eillciency at all times.

Another object relates to the noveland improved form of spray nozzlewith which my unit is provided whereby the direction of the issuingspray may be quickly and conveniently regulated bythe provision of arotatable head provided with a plurality of passages.

Another object relatesv to novel details of construction makingprovision for the picking up of oozings along the compressor shaft andfor returning them to the compressor fluid intake.

Another object relates to the provision of float mechanism adapted tobreak the electrical circuit of the device to stop the operation thereofwhen the fluid in the container has been used up so as to avoid wear ofthe partsv due to lack of lubrication by the fluid employed forspraying.

Other objects relate to added details of construction and arrangement ofparts which will be apparent from a consideration of the followingspecification and drawings, wherein:

Fig. 1 is an elevation largely in central vertical section, with partsbroken away, illustrating an improved sprayer unit in accordance withthe present invention.

Fig. 2 is a section viewed on the line 2-2 of Fig. 1.

Fig. 3 is a section viewed on the line 3--3 of Fis. 1.

` handle and particularly gives it added security .2 Fig. 4 is alongitudinal section of the novel spray nozzle.

Fig. 5 is a front elevation of a spray nozzle illustrated in Fig. 4.

Fig. 6 is a schematic wiring diagram for aotua- I tion and control ofthe unit.

Referring to the drawings, the 'reference numeral I 0 generallyindicates a motorenclosed in a dome-like casing I I', the open end ofthe casing being closed by the'tting generally indicated as I2 andsecured thereto by means'of screws as at I3. One end of the motor shaftI4 is journalled in the head of the casing II by means of the bearingI5,`and the opposed end portion by means of the bearing I6 in thefitting I2. The shaft I4 projects through the bearing I6 and has flxedlysecured to its end portion the compressor rotor I1. 1 The fitting I2 isprovided with a downwardly extending integral threaded annular flangeI8., which vis substantially an extension of the motor casing II, and isadapted to threadably engage the complementary threaded neck I9 of thecontainer 20, The body of the container is of rela; tively enlargeddiameter and has a at bottom so as to permit the unit as a whole to restthereon.

The compressor comprises a rotor Il provided with conventional vanes 2|slidably positioned in the rotor slots 22 and movable outwardly undercentrifugal action, a separable side wall or sleeve 23 and the bottomcover or holder plate 29. 'I'he sleeve 23 which forms the rotor chamberis mounted in eccentric relation to the rotor I1 as is well understoodin compressors of the type illustrated, but instead of being in fixedrelation-l ship as is conventional, I provide means for lateraladjustment of the sleeve 23 with respect to the rotor I1. This permitsnot only desired initial adjustment of degree of eccentricity andclearance of the two parts, but also permits adjustment to correct suchdesired eccentricity and clearance upon wear of the internal facing ofthe sleeve 23, with attendant increase in life of the compressor and theability to conveniently maintain it at high efciency at all times.

Such adjustability is accomplished by providing the sleeve 23 with aplurality of lateral ears 24 formed with apertures 25 to receive the.

screws 26 which extend into the fitting I2, the diameter of theapertures being larger than the diameters of the screws, as illustratedinFig. 3

wherein one of the holding screws is removed.v

Thus, by loosening the screws 26, the sleeve 23 may be finely adjustedwith respect to the rotor plate 29 provided with a plurality of lateralears 21 through which extend screws 28 into engagement with the fittingI2, the fitting I2 thus pro- 'with duct 30. The duct 30 is preferablyformed with an intermediate annular seat 34 adjacent the orifice of thefluid introduction tube 3,5, which extends through the fitting l2 intocommunication with the duct 30, the said seat 34 prof viding an abutmentfor a complementary intermediate shouldered portion of the nipple 3| andwhereby complete closure of the orifice of tube 35 is' prevented,thenipple` 3| being `otherwise adjustable with respect to the orifice oftube 35 so as to enable regulation of the amount of liquid introducedinto the compressor from the `contain- 1 er 20. If desired a spring 36may be seated within the duct 30 to bear against the reduced terminalend of the nipple 3|, as illustrated, to prevent displacement of thepredetermined adjustment of the nipple due to vibration of the unit inoperation.

The tting |2 is provided with a second radial duct 31 to which isthreadably engaged the nozzle body 38 provided with the axial boregenerally indicated as 39, the duct 31 communicating with the compressorthrough the air and vapor exhaust duct 40. The nozzle body 38 isprovided with a spray tip 4|, the tip being flanged as at 42 and held inrotatable engagement with the body 38 by means of the flanged nut/ 43threadably engaged to the body 38. The bore 39 adjacent its outer endterminates in a plurality of branched conduits such as the axiallyoffset parallel branch 39v and the 45 inclined branch 39".- The spraytip 4| is provided with holes 4| and 4|" adapted to register with theconduit abranches 39 and 39" respectively but not simultaneously. Thatis, when the openings 39 and 4|' are aligned a horizontal spray ispermitted to issue, but the openings 39" and 4|" are at an angle of 120from each other and out of cornmunication. Conversely by rotating thetip l4| for 120 the openings 39 and 4|" are brought into register tocause a' spray to be emitted at an angle, with the openings 39' and 4|out of alignment and communication. Although only two sets of openingsare shown in the illustration of Fig. 4, it will be understood thatadditional portsm-ay be provided to individually register in the samemanner. To aid in the prevention of leakage a gasket 44 may beinterposed 4between the nozzle body and spray tip, suitably aperturedfor closing off openings sothat only one passage of the nozzle is openat any one time. After the ports are set to spray at the selected anglethey are held in position by tightening lock nut 43.

For the purpose of preventing oozing of liquid from the compressorupwardly along compressormotor shaft |4 during operation of the device,I

'provide thev bearing i6 with an annular groove 45 which is connectedthrough the duct 46, which extends through the bearing |6 and fittingI2, to the duct 30, and thus permits any liquid which is forced upwardlyalong .the shaft to be returned tothe compressor through the air-liquidintake duct 33.

The unit is provided with a, handle, generally indicated as 41 securedto the motor casing to permit the device to be operated while held inthe hand, and when so held may be actuated by depression of the triggerswitch 48 connected into the line 49. 'I'he spraying device is alsoconventionally employed by placing it on a suitable support such as ashelf or table within, for example, a room which is to be sprayed withinsecticide, and for such purpose a conventional timer switch mechanism,such as that described in United States Patent No. 1,990,165, andgenerallyindicated as 50 is provided in handle 41, and connected in line49 in parallel with trigger switch 48. By setting the timer switch thesprayer' may be actuated for a predetermined length of time, within thelimits of the mechanism, without requiring the presence of the operator.

However, when the device is set for operation by means of the timeswitch 50 the possibility valways exists that the liquid in container 28will become exhausted 'before the switch 50 opens, due either to a toohigh rate of flow of the uid or too long a time setting in proportion tothe amount of liquid ln the container, and in the absence of theoperator, continued actuation of the device after exhaustion o f theliquid will cause undue wear of the compressor parts due to lack oflubrication by the liquid. In order to prevent such occurrence I providethe container 28 with a float 5|, the rod 52 of which extends andreciprocates through a suitable aperture in the fitting |2 to terminatewithin the motor casing adjacent the contiguous portion of the handle 41and the timer switch 50 thereof. The

upper end of rod 52between its setting stop 53 and its breaker stop 54,extends freely through the end of a lever 55 pivoted at 55, foractuation of the micro switch, diagrammatically indicated as 51, andvconnected in series with the time switch 50. It will be understoodthat, although not illustrated, switch 51 may in the alternative be amercury or mercoid switch actuated bytilting of the lever 55. Thus; whenthe container 20 is filled with liquid, stop 54 onfioat rod 52 rises totilt lever 55'to a position where it closes switch 51,'and if the timerswitch 50 is also closed by setting for a predetermined lperiod of oper-Aation, the rdevice will continue to operate until either switch 5Uopens at the end of its set time or until the liquid in/the containerhas reached a level where the rod 52 has become lowered to an extentwhere its stop 53 depresses lever 55 sufficiently to open switch 51,whichever occurs first, and thus actuation of the sprayer device andwear of the compressor parts prevented in l the absence ef sufficientliquid in the container,

when the device is operated by means of the timer switch.

I claim as my invention:

A hand portable, compact, unitary liquid spraying device of the classdescribed comprising a liquid container having a threaded top opening, apartitioning member threaded onto said threaded openingv in saidcontainer to provide a cover therefor, said partitioning member having

